图⑧：山东招远市毕郭苹果批发市场，交易火爆。
Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.
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做到实事求是，离不开调查研究这个基本功。。业内人士推荐雷电模拟器官方版本下载作为进阶阅读
Mariah Carey has been nominated for the past three years - could it be third time lucky?。关于这个话题，safew官方版本下载提供了深入分析
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